Prins cyclization to tetrahydrofuran units of polyether antibiotics: Remarkable siloxy effect for stereocontrolled cyclization
作者:Koichi Mikami、Masaki Shimizu
DOI:10.1016/s0040-4039(00)60962-0
日期:1992.10
A novel route to substituted tetrahydrofurans is described, which is based on the Lewis acid-promoted Prins cyclization with side chain formation of CC bond. Bishomoallylic silyl ethers, rather than the (chloro)benzyl ethers and esters, provide selectively tetrahydrofurans, indicating the siloxy effect for facilitating the cyclization.
描述了一种新的取代四氢呋喃的方法,该方法基于路易斯酸促进的Prins环化反应,并形成侧链CC键。二烯丙基烯丙基甲硅烷基醚而不是(氯)苄基醚和酯提供选择性的四氢呋喃,表明甲硅烷氧基效应有助于环化。